Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 8360204 | Self-adjusting ladder leveling device A self-adjusting ladder leveling device includes a first locking member attached to the ladder, and a second locking member movably associated with the first locking member. First and second legs extend outwardly from the second locking member toward a supporting su... | 01/29/2013 |
| 7686134 | Ladder support and bracing apparatus A ladder support and bracing apparatus includes a panel that has a top side, a bottom side, a first end, a second end, a first lateral side and a second lateral side. Each of a pair of lips is attached to and extends upwardly from the top side and each is coextensiv... | 03/30/2010 |
| 7315707 | Image forming apparatus with movable placement members The image forming apparatus includes a first placement member, a second placement member, a third placement member and a fourth placement member, which contact with a placement surface on which the image forming apparatus is placed, and which support the image formi... | 01/01/2008 |
| 7293630 | Ladder stabilization device Stabilization devices for use with folding and/or extension ladders and methods of stabilizing ladders are disclosed herein. A stabilization device of one embodiment includes an upper shaft for operative coupling to a ladder's upper end. An outer leg has a lower end... | 11/13/2007 |
| 7255198 | Tripod extension stepladder The present invention 10 discloses a stepladder having a ladder portion 18 that is comprised of rungs 24 and includes two ladder side rails, and a support portion that includes two angularly disposed telescoping legs 20 that provide mecha... | 08/14/2007 |
| 7222695 | Ladder leveller A ladder leveller for mounting onto at least one stile of a hollow runged ladder includes an elongate stile extension member, a cross bar sized for mounting journalled through a hollow rung of the ladder. A locking pin extends from the cross bar, through one of an a... | 05/29/2007 |
| 7216742 | Ladder stabilizers A step ladder stabilizer for mounting behind the front step portion and having two adjusting legs which adjust as a slide lock moves vertically within a slot attached to the rear of the ladder steps. When not in use, the ladder stabilizer closes flush against the ba... | 05/15/2007 |
| 7159829 | Height adjustable support for food service equipment A support (10) is disclosed for use with food service equipment. The support has a tubular upper portion (11) and a tubular lower portion (12) telescopically mounted within the upper portion for adjustable vertical movement. The upper portion ha... | 01/09/2007 |
| 7147234 | Locking leveling support legs for wheelbarrow An improved leg means providing leveling support for a wheelbarrow resting on un-level ground. As wheelbarrow is lowered to resting position, a center pivoting cradle leg member having left and right leg-feet portions depending downward and laterally outward from un... | 12/12/2006 |
| 7134676 | Self-leveling wheelbarrow The inventive wheelbarrow provides novel features that allow the wheelbarrow to remain level on uneven or sloping terrain when parked, thereby providing more stability. ... | 11/14/2006 |
| 7093690 | Ladder stabilizer The present invention provides a method and apparatus for stabilizing a ladder for minimizing accidents. For example, a main bracket may be connected to a lower arm, a foot bracket may be connected to the lower arm, an upper arm may be connected to the foot bracket ... | 08/22/2006 |
| 7073629 | Ladder support apparatus and methods Ladder support apparatus and methods are disclosed. In one embodiment, a support assembly adapted for use with a ladder includes at least one elongated member adapted to extend between first and second legs of the ladder when the ladder is positioned in an operating... | 07/11/2006 |
| 7036633 | Quick release for ladder levelers A quick release ladder leveler attachment system. So that a leveler may be mounted or released from the rails of a ladder quickly and without requiring the use of tools, a leveler attachment structure is added to the lower outer surface of the ladder rails. It may b... | 05/02/2006 |
| 7000731 | Multi-material cover for a ladder rail end A cover for an end of a ladder rail includes a shell and a tread. The shell comprises at least one material, whereas the tread comprises at least one other material. The shell is sized to engage the ladder rail. The tread is engaged with the shell at least partially... | 02/21/2006 |
| 7000753 | Bulkhead-mounted wood storage and transportation device A chute assembly for connecting an elevated area to a lower area, such as within a cellar entry enclosure, for transporting items. The chute assembly may also include a bin enclosure for storage of the items in addition to transporting them. ... | 02/21/2006 |
| 6997282 | Adjustable ladder A ladder is adjustable in a plurality of planes so a wide variety of sloped surfaces can be accommodated. The ladder includes non-slip surfaces on the steps and a paint can holder that can accommodate a one gallon paint can. ... | 02/14/2006 |
| 6997283 | Ladder stabilizer attachment apparatus and methods Ladder attachment apparatus and methods are disclosed. In one embodiment, an attachment apparatus for a ladder includes a main support adapted to be coupled to the ladder approximately parallel to the rungs. The main support includes a first coupling member proximat... | 02/14/2006 |
| 6959785 | Stabilizing system for ladders and scaffolding A stabilizing ladder system is disclosed that comprises a ladder of scaffold assembly with a pair of rails and a plurality of rungs. The system further includes a ladder leveling assembly comprising a lower extension arm mounted on each of the rails of the ladder as... | 11/01/2005 |
| 6935463 | Safety support for ladders A ladder safety support for use with an existing ladder is disclosed. The support includes an attachment assembly for removable connection to the lower end of the ladder and one of two interchangeable foot assemblies for supporting the ladder on a surface. The first... | 08/30/2005 |
| 6902036 | Stabilizer for folding step ladders A ladder is equipped with a stabilizing device. The stabilizing device resists movements of the ladder's feet which would occur in response to movements of a ladder's user while on the ladder. The stabilizing device holds the ladder's feet and provides transverse an... | 06/07/2005 |
| 6902140 | Adjustable support foot An adjustable support foot comprises a support post, a plurality of retaining plates, a control device and an outer shell. The support post has a base and a screwed axle erected thereon. The retaining plates each provided with a screw thread cover around the screwed... | 06/07/2005 |
| 6837339 | Self-leveling support A self-leveling support includes a first stile (1) and a second stile (2), a first leg member (6) and a second leg member (7), each having an elongate element adapted to move longitudinally relative to one of the stiles (1, 2), a s... | 01/04/2005 |
| 6799660 | Step ladder device A step ladder device for balancing and stabilizing a ladder upon most any surface. The step ladder device includes a ladder having pairs of side rails and rung members being attached to the pairs of side rails; and also includes a ladder support assembly having leg ... | 10/05/2004 |
| 6793041 | Ladder leveling device A device for leveling a ladder on unlevel or uneven surfaces that includes a wedge shaped support member and features for safely retaining a ladder on a sloped top surface of the support member. Features include a rail, a slip resistant coating on the top surface, a... | 09/21/2004 |
| 6779632 | Adjustable leveling stepladder An adjustable leveling stepladder is provided with telescopically adjustable support legs that allow it to be positioned on uneven surfaces. A pair of bubble levels that are used to indicate proper and safe horizontal positioning in two dimensions. ... | 08/24/2004 |
| 6729440 | Adjustable ladder A ladder that would have a plurality of legs that would be independently adjustable from each other is disclosed. Each leg would have an incorporated adjustable leg that could be set at a varying height, with each adjustable leg having a non-skid pad on the bottom t... | 05/04/2004 |
| 6640931 | Universal, hand attachable,multi-use, l-shaped, ladder utility bracket, with ladder leveler attachment A multi use L-shaped ladder utility bracket with ladder leveling attachments that is hand fastenable, due to four proprietarily aligned apertures in the bracket's elongated member, using two u-bolts and associated nuts, to any two rungs of any ladder with... | 11/04/2003 |
| 6547036 | Ladder leg support apparatus A ladder leg support apparatus includes a support member having upstanding inner side and back walls and inclined outer side and back walls. Flanges selectively positioned along the inner side walls support a plate at a selected height for supporting a la... | 04/15/2003 |
| 6478113 | Ladder leveling system A ladder leveling system for facilitating the safe use of a ladder on uneven surfaces and maintaining the rungs of the ladder in a substantially horizontal orientation. The ladder leveling system includes a ladder with a pair of side rails and a plurality... | 11/12/2002 |
| 6450292 | Ladder levelling device A ladder levelling device which is simply operated by person's foot, embodying stile extender (7) either inserted into hollow stile (1) or removably attached to side of solid stiles of ladders or stepladders. Consisting of outer fixed housing, internal te... | 09/17/2002 |
| 6435306 | Ladder leveling arrangement A pair of ladder leveler members attach to the base portion of the side rails of an extension ladder. Each leveler member has a sleeve that is mounted to the respective rail parallel to the rail, and a slide leg that is movable in the sleeve. The ladder s... | 08/20/2002 |
| 6382353 | Slip prevention device for ladders In the lower area of a ladder two pull or pressure rods are arranged on either side in a pivoting manner. Via sliding sleeves and joints said rods are joined to telescopic support elements which are each arranged at the level of an upright of the ladder. ... | 05/07/2002 |
| 6378656 | Ladder leveler A ladder leveler is disclosed in which two pivoting arms are mounted on a base plate to provide a self-adjusting and infinitely adjustable device. The two arms cooperate with a movable locking member or tumbler which is mounted between the arms and shaped... | 04/30/2002 |
| 6374947 | Ladder leveling device A ladder leveling device including an upper block portion couplable with respect to a bottom of a ladder leg. The upper block portion has a generally rectangular configuration defined by a closed upper end, an open lower end, a front wall, a back wall and... | 04/23/2002 |
| 6336521 | Ladder levelling device Prior ladder levelling devices are difficult to adjust to a surface because it is necessary to unweight the ladder at the same time as adjusting. The present invention provides opposed locking brackets so that adjustment can be made by releasing a locking... | 01/08/2002 |
| 6293367 | Ladder leveling apparatus An extension ladder with ladder leveling apparatus consisting of an extension ladder, an elongated stabilizing strut with a series of teeth extending laterally therefrom and attachable to one leg of the extension ladder unit by way of a pair of u-bolt com... | 09/25/2001 |
| 6189653 | Multi-purpose scaffold A multi-purpose scaffold includes rail parts disposed adjacent one another and displaceable relative to one another, displaceable and adjustable steps disposed therebetween, fold-out splayed supporting poles connected to the rail parts, a connecting rod c... | 02/20/2001 |
| 6164608 | Ladder leveling chock system A ladder leveling chock system for maintaining a level surface for resting a ladder thereon. The ladder leveling chock system includes a block with top and bottom faces, an end face, and a pair of side faces. The top and bottom faces converge together at ... | 12/26/2000 |
| 6158552 | Adjustable and locking step stool This invention relates generally to an apparatus providing a secure step stool that can assist a user when climbing into an elevated vehicle. The apparatus is adjustable in height and includes foot pads allowing a stabilizing weight to be applied to the s... | 12/12/2000 |
| 6044929 | Ladder leveling device A ladder leveling device that is free-standing and is not installed, or fixed to, the existing ladder (80). Simple, one-person operation of device provides quick convenient way to establish a level and stable work surface over non-level ground, allowing t... | 04/04/2000 |